Arguments
=========
The ``photom`` step has the following optional arguments.

``--inverse`` (boolean, default=False)
  A flag to indicate whether the math operations used to apply the
  correction should be inverted (i.e., divide the calibration data
  into the science, error, and variance data, instead of the usual multiplication).

``--source_type`` (string, default=None)
  Force the processing to use the given source type (POINT, EXTENDED),
  instead of using the information contained in the input data.

``--mrs_time_correction`` (boolean, default=True)
   A flag to indicate whether to turn on the time and wavelength dependent
   correction for MIRI MRS data.